Sienna and Sierra Bernal are identical twins - but Sienna is half the size of her twin sister Sierra. The blonde-haired, blue-eyed teens age 13 look so similar - but one sister has rare primordial dwarfism. Primordial dwarfism is so rare that that there are only 200 people in the world known to have the condition. Sienna is the only primordial dwarf in the world to have an average sized twin.
Miss Lucia Zarate b.1864 Mexico ~ The smallest human being ever known. The first person to have been identified with Majewski Osteodysplastic-Primordial Dwarfism Type II. Entered into the Guinness World Records as the "lightest recorded adult" at 4.7 pounds at age 17. Achieved her full growth at age 1 year. Worked as part of an act billed as the "Fairy Sisters". When her circus train became stranded in snow in the Sierra Nevada mountains in 1890, Lucia died of hypothermia.